https://thepointsguy.com/airline/ita-matrix-tutorial/?utm_section=lat
Google's ITA Matrix helps advanced travelers find itineraries that match specific criteria. Here's how to use the routing and extension codes for ITA Matrix.
ita matrixusesearchflights
https://addons.opera.com/da/extensions/details/ita-matrix-powertools/
Adds new features and builds fare purchase links for ITA Matrix
ita matrixadd onspowertoolsopera